Several security related problems have been discovered in Mozilla andderived products such as Mozilla Thunderbird. The CommonVulnerabilities and Exposures project identifies the followingvulnerabilities:

CVE-2006-2779

Mozilla team members discovered several crashes during testing of the browser engine showing evidence of memory corruption which may also lead to the execution of arbitrary code. The last bit of this problem will be corrected with the next update. You can prevent any trouble by disabling Javascript. [MFSA-2006-32]